Re: A multisensorical virtual reality
OK, first of all: CyberSpace is a separate universe, like Discworld or Middle Earth. It is not Earth seen through some odd gizmos, it is not an aspect of Earth's computers. If you try and model it that way, you will give yourself the biggest PITA you can imagine. And, it will be dull, unplayable, or both.
I've thought long and hard about this, ever since the days of CyberHero. I think the far-and-away-best method to handle everything would be to have the deck give Multiform with Linked XDM, and the Limitation "Leaves original body behind in a coma" on the Multiform---yes, that's technically a Duplication, but since the original form is both useless and in a different universe, I think it's simpler as a Multiform.
This lets the "programs" be merely window-dressing (not even up to the level of Special Effects); you say your deck gives your other form this, that, and the other abilities because "I wrote up this neat wossname program," while the mechanics are that you built the other form to have X, Y, and Z abilities/skills/powers.
Believe me, having read CyberHero I can promise you that writing up each and every ability as a separate program is nothing but an enormous PITA. Just give the other form the neat tricks, and have done with it.