second vote for EasyRecovery Pro .
my part time job is fixing PC troubles/setting other ppl's hardware/software and Easy Recovery resolved lots of these "should i cry and then kill myself or just kill myself now and cry later " situations.(and many ppl love me forever after sucessfull ressurecting of their masterpieces
DOnt use Norton Utilities/DIsk Doctor ,it'll ****up sectors beyond repair in 90% of cases ,trust me on this .Try using it only if everything else fails ,it worked only once for restoring some partition table .
Anyway ,Ontrack Easy Recovery (or Power Quest Lost & Found etc..) software can rescue all data on drives where partition info is lost,or hard drive is formated ,data deleted etc by acessing data sector by sector ignoring regular partition/file info.Basic principle is based on a fact that when you delete/format data ,delete /format command doesnt actually write zeros instead of file data,it just masks first symbol of file name (or smth like that)and file content actually stays there untill the moment smth ELSE is actually written to that sector .
Prob with your case is that you installed XP over that partition ,so XP files 're written on some sectors on beginning of your drive .These sectors i'm afraid 're dead.Gone. Theres a hope for latter data after first 1 gig or smth (which poopoo XP destroyed )
Anyway you need second empty drive where recovered data from
first drive will be copied (drive size should be same or bigger )
If you could unly undo XP install part ,ressurection process could be 100% sucess.(by reversing bit by bit somehow on first part of drive ? -anti install - setup.exe thru Little Labs IBP hmmm ...
Just be patient with it - scanning and copying process can last 3-6 hours on usual 80 gig drive full of data - with latest version its faster i think .Shiet like that just happens to everybody dont hit yourself in the head too much ,have a drink and do smth nice for your client .I once deleted one guy's only master dat
(he just came to tranfer mix to tape)
Then i rerecorded/arranged/programmed/mixed that one deleted song and it became a hit eh