data transfer from text files to wordpress MYSQL database

I need to transfer data from a live website, based on script using perl/cgi to a wordpress (PHP, MySQL). You need to transfer same categories and sub-categories from the current website, to the new wordpress based website on the new server. The current website is using standard classifieds script from http://www.activewebsuite.com. I have a new classifieds theme for wordpress. The data for the ads are stored in .pl files and each users details are stored in a separate .pl file. The images for each ad are stored in separate folder. Here is one record example from [login to view URL] file. 50744|100|1000|128514|robertc|melbourne|Victoria|[login to view URL]|03 23 55 55 55|True|Art By Robert Cooper|||No|New||||||||23-Mar-2011|24-Sept-2011|2456015|2456195|0|[login to view URL]|True|||0 The downtime must be minimal. Please do not apply if you have not done a similar project already, or you don't have any experience with text files, data transfer and MySQL tables.