Vicky is saying that the vyper/vytec will let you dive your profile as you wish, (ie: slower ascent or deepstops, etc.)When you do so, you have to accept that the Total Time to Surface will be increased since the deco time will increase over that which the simulator gave, because you were at ongassing depths longer than the simulator had you at ongassing depths based on it's default ascent profile. The sim has to have some default ascent profile, or it'll lack enough info to compute any deco info at all. The downside of the somewhat unexpected increase in deco obligation, is that you now need more gas that you thought you'd need when you first looked at the Time To Surface display when you began your ascent.
If you want to be able to cut tables from the simulator as backup incase of comp failure, you'll have to dive the sim's profile to make them valid, otherwise, it's an iron pony ride.
If you want deep stops and a slower ascent, just cut tables from V-Planner (or whatever you like), and either follow them if the comp fails, or at least plan your gas supply on the tables, and that way, you'll be covered for the extra deco time the comp gives you over the deco time the sim gave you, since you ongassed during the slower ascent and deep stops that the sim couldn't account for.
Perhaps the best way to get some meaningfull numbers from the sim would be to add the extra minutes you expect to spend on deep stops and slower ascent to the intended bottom time. That will probably give a more realistic approximation of the actual deco time you'll incur, but I'd be hesitant to plan gas use from it, as the comp will have it's deco time at a shallower depth, (lower ata, hence gas usage rate) than you will actually be at for the deeper stops.
You just can't have your cake and eat it too. At least not untill you get into those $1200 computers that let you download the whole diveplan into it.
I hope I've finally got all this into perspective.
Darlene