Quick file conversion via PERL

Simple script needed that will convert a text file of our inventory into an output file for use in importing to x-cart shopping cart. No knowledge of x-cart necessary. The script needs to: Ask for and read in a tab delimited file. Perform some string manipulation that takes a product number and converts it the image URL specification and thumb_nail image URL specification. Write the file out in tab-delimited text. Attached is an example output file. The text manipulation takes the 6 digit product code, converts the first 2 digits into an alpha (e.g., 13xxxx converts to [login to view URL] that is 13 maps to M, the 13th letter) The other fields are just straight imports/exports.