Basically, you're not really gonna widen (or tighten) your range, or spaz out and play super-fast preflop, just because you're short. It's still a cash game, so the blinds are not gonna go up and you're not gonna get blinded out.
What happens instead is that you can no longer imply your
odds in most cases, so have to either eliminate your speculative range or turn it into bluffs. That means, for example, you'll probably have to fold 22-77 UTG instead of opening them to setmine. Instead, your range needs to be weighted towards
high-card value; so for instance, while a 6max UTG open range at a regular table will look something like {22+,AQo+,A2s+,KTs+,QTs+,JTs+,T9s,98s,87s,76s,65s} an UTG open range at a short table might instead look like {TT+,A3s+,K9s+,QTs+,JTs+,ATo+,KTo+}. Same range percentage-wise, but more heavily weighted to high-card value.
If you want you could also eliminate KTo and maybe KJo as well from your UTG (to avoid domination/RIOs), but you then have to widen your range somewhat in later positions (you could open a tighter range from UTG and HJ --say, 12.5% and 18% instead of 15 and 22%, and then add a few
hands to your CO and especially your button to compensate). In fact that might actually be advisable because you have to worry much less about RIOs in late position, since ranges are wider and the majority of the time you'll be in position.
(as for why I eliminated A2s, it's because wheels flop horribly to A2. You have the sucker end of the straight and no blockers. Likewise, PPs lower than TT will flop an overcard far too often to have any significant high-card value.)