That Desert world seed it's nice... but the problem is the massive lack of embark points and the lack of any interesting metal at all in most locations I've scouted 
And I'm not talking about iron here, most places have just a bit of cooper and maybe some silver... the was one location though that had a ****load of gold... hell, most of the terrain under the sand was gold! I was tempted of starting there and making a golden city instead of a glass one... 
How can I get more embark points? Also... I've seen some desert locales have "scarce" trees, so I might not need the mods, well, might need the one for pearlash if you need 1 pearlash per square wall of crystal 
If you're using the World Gen profile provided upthread, & aren't familiar with configuring the Advanced Parameters using the in-game tool, just edit the appropriate line of the profile in your world gen file (which you're obviously familiar with or you wouldn't have gotten the data above into it).
The specific line for embark points is "[EMBARK_POINTS:1274]", just change the
1274 to whatever, but make sure it's the one in the section headed "[TITLE:DESERT]" (or whatever you called it if you changed it).
If you want improve the availability of metals,
lower this ("[MINERAL_SCARCITY:1500]") number, I don't think doing so will bork the geography.