yep. done already there -> http://forum.xentax.com/viewtopic.php?p=138275#p138275
. should reimport the btex. don't ignore the text in the post. mod precision. it does full data with mipmaps. not sure how relevant this is for ui and text, but the files contain mips and those should be present when reimporting. also notice this is dx10 dds. fun stuff.
the fntbin contain just btex for the glyphs too. you hextract? you can search for the signature 'SEDBbtex'. the filesize is directly below (using 0x10 pad). it's a copy paste job. disassembling the array header seems some bullshit i'd rather not like todo, right now, sorry. it's a one shot interest anyway. sorta blah. figure it out. i'm sure know how to make this work.