Softpaq recommended 
by Compaq and the AeroFAQ:

SP0891.zip
918KB
Title:  Compaq Computer Setup for Windows  
Version 1.50
CATEGORY:  Software
EFFECTIVITY DATE:  8/22/94
PRODUCTS AFFECTED: Contura Aero 4/33c, Contura Aero 4/25,
OPERATING SYSTEM:  MS-DOS 6
SYSTEM CONFIGURATION: Windows Version 3.1 or greater
DESCRIPTION:  This software release contains the Computer Setup for Windows previously shipped on the Windows Supplemental Programs diskette.  SoftPaq file SP0892 should also be downloaded to ensure that all files are updated when used with the above machines.
1) Fixed a problem with a conflict of two files called STORAGE.DLL.
2) Fixed Volume Test on LTE Elite.

LANGUAGE: English
SUPERCEDES: SP0843, SP0785
ftp://ftp.compaq.com/pub/softpaq/sp0501-1000/SP0891.ZIP
ftp://ftp.compaq.com/pub/softpaq/sp0501-1000/SP0891.txt

LANGUAGE: Japanese
SP0962.ZIP, Ver. 1.50J Rev.B 
ftp://ftp.compaq.com/pub/softpaq/sp0501-1000/sp0962.zip



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Other Softpaqs:
Although perhaps newer, older or originally not intended for the Aero, you might want to try these softpaqs because of localizations, extra features or other purposes. 

I tried it out and can not recommend the installation of the Version 3.10 Rev A (SP2281.EXE - SP2039.EXE) intended for the Armada. Although it now seems to run OK it made some difficulties in the installation (I had to change the config.sys manually, because it complained about the cpqcm.sys-driver). It also wanted a newer package of pcmcia-drivers. In the end it had an interesting look but showed no new features and I am still not sure if it really works.

SP2281.EXE - SP2039.EXE
1166K
Softpaq Solution: SP2039
Part Number: 140233-003
Title: Armada 1100/4100 Computer Setup for Windows 3.1
Version: 3.10 Rev A
CATEGORY: Drivers/Laptop
EFFECTIVE DATE: 26 July 1996
PRODUCTS AFFECTED: Armada 1100 and 4100 Families
OPERATING SYSTEM: Windows 3.1x
DESCRIPTION: Creates a diskette containing Portable Computer SETUP for Windows 3.1x on Armada 1100 and 4100 Families of notebook computers.

LANGUAGE: English
ftp://ftp.compaq.com/pub/softpaq/sp2001-2500/sp2039.exe
ftp://ftp.compaq.com/pub/softpaq/sp2001-2500/sp2039.txt


LANGUAGE Spanish
ftp://ftp.compaq.com/pub/softpaq/sp2001-2500/sp2281.exe
ftp://ftp.compaq.com/pub/softpaq/sp2001-2500/sp2281.txt


LANGUAGE German
ftp://ftp.compaq.com/pub/softpaq/sp2001-2500/sp2280.exe
ftp://ftp.compaq.com/pub/softpaq/sp2001-2500/sp2280.txt


LANGUAGE Italian
ftp://ftp.compaq.com/pub/softpaq/sp2001-2500/sp2279.exe
ftp://ftp.compaq.com/pub/softpaq/sp2001-2500/sp2279.txt


LANGUAGE French
ftp://ftp.compaq.com/pub/softpaq/sp2001-2500/sp2278.exe
ftp://ftp.compaq.com/pub/softpaq/sp2001-2500/sp2278.txt


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SP0958.ZIP
ftp://ftp.compaq.com/pub/softpaq/sp0501-1000/SP0958.ZIP
ftp://ftp.compaq.com/pub/softpaq/sp0501-1000/SP0958.txt
1,03MB
File name:  181371US._01
Title:  Compaq Computer Setup for Windows - Plug and Play
Version: 2.00
CATEGORY:  Software
EFFECTIVITY DATE:  6 October 1994
PRODUCTS AFFECTED:  Presario 500 Family, Presario 700 Family, Presario 900 Family
OPERATING SYSTEM:  MS-DOS 6
SYSTEM CONFIGURATION: Windows Version 3.1 or greater
DESCRIPTION:  This software release contains the Computer Setup for
Windows  Plug and Play Version.  This version of Computer Setup for
Windows supports the Plug and Play solution available on the Presario
500, 700, and 900 Families.


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SP0843.zip
ftp://ftp.compaq.com/pub/softpaq/sp0501-1000/SP0843.ZIP
919KB
Computer Setup for Windows
Version 1.50
English.
For use on a Concerto,Contura Aero,LTE Elite,Prolinea MT, Enhanced Prolinea, Presario 600s w/TAM, and Presario 800s running MS-Windows 3.1. Softpaq SP0827 should also be downloaded to ensure that all files are updated when used on the above mentioned machines.
PROBLEMS ADDRESSED
1) Fixed a problem with a conflict of two files called STORAGE.DLL. One was part of CSW and the other was part of a Microsoft product.
2) Fixed Volume Test on LTE Elite.