As of Firmware 3.50 Sony has blocked the write access to the /PSP/GAME/ directory. This means you cannot add new content to the Game column of the PSP XMB (pretty much TN-V eCFW for PS Vita).

This would force you to convert homebrews into the ISO format, which doesnt work with all homebrews.

Using the OneMenu method will enable you to play and add new homebrews onto your PS Vita, without dual-booting ARK or VHBL.

While this method is not 100% perfect, it enables you to add new homebrews and play them right from TN-V ('s recovery menu).