Need Help HP L360 and flexi question

So I am making a run of 8' but the graphic will only eat up about 25" of material down the side. It will be the bottom to a sign. I am trying to remember how to go about reprinting the other section with some misc decals etc so as not to end up with a 3' x 8' scrap.

I think I used to go into flexi and in rip set media offset or something from left side then measure out a safe margin and add the other decals and do another print aligning to bottom left. Sound right? why dont i rip them all together? because all that is a HUGE file after i duplicate all the decals to fill the holes, I mean like 2.5 gigs. Ripped at full size, maybe I will pop there and see what ripping at 10% or something does and enlarge to 1000%

Ideas?

THanks in advance.

P.S. my rolands were so much easier there, feed material back then set the origin where i wanted then print away....