If you have tried installing it as it is and it crashes, then there is no way around that. If we knew the software and where you downloaded it from, there may be clues at their web site for such situations like this.
Have a look at http://support.microsoft.com/kb/896456 which explains about running 32 bit software on XP 64 bit.
The first paragraph seems to disallow what you want, eg;
"The 64-bit versions of Microsoft Windows Server 2003 and of Microsoft Windows XP use the Microsoft Windows-32-on-Windows-64 (WOW64) subsystem to run 32-bit programs without modifications. The 64-bit versions of Windows Server 2003 and of Windows XP do not provide support for 16-bit binaries or 32-bit drivers. Programs that depend on 16-bit binaries or 32-bit drivers cannot run on the 64-bit versions of Windows Server 2003 or of Windows XP unless the program manufacturer provides an update for the program."
But read on down for possible options.
I have to run a piece of software that carries the warning: only for KSS 5.5, 5.6, 8.x, VSS 8.x and only for WIN XP 32bit.
Unfortunately I have a 64bit XP installation.
If I run the program it crashes.
Is there anybody who knows if I can cheat the software in to thinking it is running on 32bit??