Softpaq recommended 
by Compaq and the AeroFAQ:


SP1992.EXE
ftp://ftp.compaq.com/pub/softpaq/sp1501-2000/sp1992.exe
ftp://ftp.compaq.com/pub/softpaq/sp1501-2000/sp1992.txt
375K
Softpaq Solution: SP1992
File Name: 486s0516._01
Title: Contura Aero System ROM (16 May 1996)
Version: (16 May 1996)
CATEGORY: ROMPaq
EFFECTIVE DATE: 16 May 1996
PRODUCTS AFFECTED: Contura Aero
OPERATING SYSTEM: MS-DOS 5.0 or greater
SYSTEM CONFIGURATION: N/A
SUPERSEDES: SP1487
DESCRIPTION: This creates a diskette that allows the user to upgrade the System ROM on a Conutra Aero to an interim maintenance release dated 16 May 1996.
- Restores the RTC time after a standby.
- Flushes the disk cache before entering standby.
- Restores processor speed after standby by saving it at the beginning of sleep and restoring it at the end of wake-up.
- Solves problem reclaiming upper memory blocks by eliminating cut table.
- Solves Int 14 test failure on extended stop bits by fixing the Int 14 handler.

THIS SOFTPAQ IS NECESSARY TO GET FULL ACCESS TO THE RAM AFTER UPGRADING THE AERO WITH A 16MB-RAM MODULE TO THE MAXIMUM OF 20 MB. IT ALSO MAKES BIGGER HARDDRIVES USABLE WITH THE AERO.


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Other Softpaqs:
There may be some reason to go back in time with the bios for instance if you use linux on the aero. See http://www.alvestrand.no/linux/aero-faq.html for more information. So here is a list of those older rompaqs. 

SP1487.exe
ftp://ftp.compaq.com/pub/softpaq/sp1001-1500/sp1487.exe
ftp://ftp.compaq.com/pub/softpaq/sp1001-1500/sp1487.txt
288K
24 April 96
ROMPaq,
EFFECTIVE DATE:  07 Dec 1995,
PRODUCTS AFFECTED:  Contura Aero

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SP1331.exe
ftp://ftp.compaq.com/pub/softpaq/sp1001-1500/sp1331.exe
ftp://ftp.compaq.com/pub/softpaq/sp1001-1500/sp1331.txt
288K
19 Juli 95
ROMPaq,
EFFECTIVE DATE:  19 Jul 1995,
PRODUCTS AFFECTED:  Contura Aero

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SP1291.exe
ftp://ftp.compaq.com/pub/softpaq/sp1001-1500/sp1291.exe
ftp://ftp.compaq.com/pub/softpaq/sp1001-1500/sp1291.txt
288K
14 Jun 95
ROMPaq,
EFFECTIVE DATE:  14 Jun 1995,
PRODUCTS AFFECTED:  Contura Aero

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SP1124.EXE
ftp://ftp.compaq.com/pub/softpaq/sp1001-1500/SP1124.EXE
ftp://ftp.compaq.com/pub/softpaq/sp1001-1500/SP1124.txt
632KB
Part Number:  190634-004
Title:  Contura Aero System ROM (19 Jan 95)
Version:  4S_011995
CATEGORY:  ROMPaq
EFFECTIVITY DATE:  6 March 1995
PRODUCTS AFFECTED:  Contura Aero Family

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SP1073.ZIP
ftp://ftp.compaq.com/pub/softpaq/sp1001-1500/SP1073.ZIP
ftp://ftp.compaq.com/pub/softpaq/sp1001-1500/SP1073.txt
334KB
Part Number: 190633-010
Title:  Contura Aero 11/01 ROMPAQ
Version:  11/01/94
CATEGORY:  ROMPaqs
EFFECTIVITY DATE:  20 December 1994
PRODUCTS AFFECTED:  Contura Aero Family
DESCRIPTION: Upgrade the System ROM on a Contura Aero to the 11/01/94 version.
Corrects:
- Issues with 16MB memory boundary
- Issues with MS Backup

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SP0946.zip
ftp://ftp.compaq.com/pub/softpaq/sp0501-1000/SP0946.ZIP
ftp://ftp.compaq.com/pub/softpaq/sp0501-1000/SP0946.txt
1,11MB
File name:  181148-G_01
Title:  Portable ROMPaq
Version:  2.08
CATEGORY:  ROMPaq Firmware Upgrade Utility
EFFECTIVITY DATE:  23 September 1994

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SP0896.ZIP
ftp://ftp.compaq.com/pub/softpaq/sp0501-1000/SP0896.ZIP
1,07MB
File name:  181148-F_01
Title:  Portable ROMPaq
Version:  2.06 Rev A
CATEGORY:  ROMPaq Firmware Upgrade Utility
EFFECTIVITY DATE:  8/30/94
PRODUCTS AFFECTED: Contura Aero and others 
OPERATING SYSTEM:  not applicable
SYSTEM CONFIGURATION: not applicable
DESCRIPTION:  The Portable ROMPaq Utility allows a user to upgrade the
the System ROM on the above mentioned Laptop Products.
SUPERCEDES: SP0893, SP0808


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SP0893.ZIP
ftp://ftp.compaq.com/pub/softpaq/sp0501-1000/SP0893.ZIP
1,36MB
File name:  181148-C_01
Title:  Portable ROMPaq
Version:  2.03
CATEGORY:  ROMPaq Firmware Upgrade Utility
EFFECTIVITY DATE:  8/22/94
PRODUCTS AFFECTED: Contura Aero and others
DESCRIPTION:  The Portable ROMPaq Utility allows a user to upgrade the
the System ROM on the above mentioned Laptop Products.
SUPERCEDES: SP0808


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SP0762.zip
ftp://ftp.compaq.com/pub/softpaq/sp0501-1000/SP0762.ZIP
310KB
Firmware Upgrade diskette for the Compaq Contura Aero.
Version 486S_0416.94 Revision A.

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SP0723.zip
ftp://ftp.compaq.com/pub/softpaq/sp0501-1000/SP0723.ZIP
343KB
Firmware Upgrade Diskette for the Compaq Contura Aero
Version 486S_0307.94  Revision A.
Part Number 190634-003