Step 1: Install Servicepack1

Download and install serviepack1
windows7-sp1-KB976932-X86.exe
windows7-sp1-KB976932-X64.exe

Step 2: Install VirtualPC

Download and install virtualpc
Windows6.1-KB958559-x86-RefreshPkg.msu
Windows6.1-KB958559-x64-RefreshPkg.msu

Step 3: Install XP-Mode

Download and install windowszpmode
WindowsXPMode_en-us.exe

Step 4: Use IE 6.0 in Host

Create a shotcut in "c:\documents and settings\all users\start menu\"

Then you can find the icon "IE 6.0" will show up in the host's start menu

Step 5: Install Software and use it in Host

Install software in VirtualXP as normal host.
Then you can find the shotcut in StartMenu of Host.