Umm you bought rapidleech and want to use filezilla in it?

You can't use filezilla with rapidleech. Rapidleech itself is just a script which lets you download and upload to file hosts.

Using either the file manager (if provided) or FTP, you need to go to the 'Upload' directory and edit the Hotfile & Fileserve php files and subsequently add you account username and password. This way you can automatically upload to your FS and HF account when you use the Auto Upload feature of your rapidleech.

If you want to add a premium HF or FS account to download, you need to follow the above steps but instead of editing the files in 'Upload' directory, you need to go to the 'Download' directory and edit the appropriate php files.