When selecting/buying/downloading a Poser product, do you prefer... a- A selection of different versions of the same product, i.e., one for Poser3/Poser4, one for Poser with ProPack, one for Poser5, to choose from. b- One version of the product that is compatible with all versions of Poser3 and up (i.e., uses .bum files and has .rsr files even though later versions convert the .rsr's to .png's or can use .jpg's instead of just the .bum's?)