msiexec likes to feed on your ressources. Running it multiple times will slow down the installations even more.. Consider good ol installing.. would come with less time effort..
You're probably going to find out that it's much easier and less time consuming to just go ahead and re-install them on the other computer. You can directly copy over simple programs, but most games and 'larger' applications require certain files placed in alternate locations, such as the System32 folder, and going around and downloading all of these files individualy would be a very long and tedious process.
I want to move installed programs from my Windows XP computer to my Windows Vista computer. I want to move it and not just reinstall it because the installations take forever and I can only do one at a time. (With copying and such I won't have to take forever).
Should I use a Virtual PC then move the whole VHD file to the new computer?
Should I install it then simply copy/paste the files and copy/paste registry values?