Custom security Algorithms (General questions)

Hi i want to make a VPN where i can give Users a choice to use custom algorithms and password protection . Something like truecrypt where a drop down lets you select blowfish , two fish aes etc etc.

If i buy your Devloper License with source , will i be able to do so ? Willi be able to add/remove default AES in the implementation . Also does the full source version include virtual adapter driver source ? . I would like it to rename it for my application.