tech is right, as a .psd file, various "effects" exist as seperate changable, or removable entities. The .psd extension is what you want when you need to retain editability of things such as layers, layer styles etc.
I print out of flexi & just by flattening & saving as a .tif you will lolck in any "effects" as they appeared in the .psd file at the time you chose "save as"
Thanks everyone for your input. What I did and it worked great is...........
1) Created my artwork in Photoshop with the outerglow.
2) In FLexi I have the correct background color from a previous job for the same customer so I took the cmyk color chart, exported it as a postscript eps, opened it in Photshop, flattened it, saved it as tiff, brought it back in Flexi, Printed it, Matched background color on chart.
3) Added a background to the artwork in Photoshop (color matched from chart), flattened it, saved it as a tiff, took it back to Flexi, laid it on top of the 98"x650" (vector) background field, Did a eye dropper for back-up.
4) Masked off a section, printed it and it looks great.
Thanks isign and Mason, all our thinkers worked it out.