XP SP2?? Tut tut! We know why you don't want to upgrade to SP3 don't we?
Search for an old version of MI if you want, but you can also use Mapsource to see the available space and it should work with XP SP2. You need to go a bit further along with the phantom install though. Make sure you select more map data than will fit on the SP, say around 2GB. Any cumulative combination of gmap folder data you have on you PC will do, but the current version of all of NA is 1.99GB by itself. When you click 'Send to Device' it will baulk and tell you there's not enough space letting you know what's actually available. Mine has 1504.1MB: