|Might be useful if you clarify things a little perhaps...?|
How many physical drives in the system; one or two? If only one drive the how is it partitioned?
To where did you install the Windows afresh; which drive/partition etc. accordngly?
Are the files you obviously would like to recover on a different physical disk to that of the new OS installation; or are they on the same disk - but in a differrent partition?