Quick Burning Question

[Jedi Master]

Ok i burn ps2 dvd games with record now max ,i have a .ISO image of a ps2 game but when burning with RNM it only wants to burn the image at the discs max speed ,in this case X4 as im using the Ritek 4 speed disc(G04 dye).But if i burn a .GI or a disc to disc copy it will burn it at the speed i want.
So i deside to burn the .ISO with Nero as last time a burnt a .ISO of something else with nero it wrote at the speed i set.
So i went File > Burn Image ,then i selected the image went to burn but i got this message ' you are about to create a multi-session write once disc.Session no.2 and above will not be readable with some dvdrom drives and operating systems prior to XP. How do you want to continue ? '

1.Burn multisession anyway
2.Burn without multisession
3.Cancel

Which one do i wanna select?

[plextor]

If you already have the iso file you could use dvd decrypter to burn the iso file and change the settings for what speed you want. For back up's i use nero and just do a dvd copy can change the settings for your own likeing.