Almost.... just leave out that ">" after the "//"
Like this:
<a href="x-avefront://---.dream/exec/Cop">Dynamite_Cop</a>
I've booted quite a bit of games like this while testing PSDv2. Just binhack the boot.bin with the ip.bin and it's always worked for me.
For booting with Dream Passport, I've been unable to boot other browsers from anything other than a 45000 lba, but normal katana, wince, and homebrew games work fine. For example: I wanted to be able to boot up DP2, PW 2.6, and DPP from the DP3... or rather boot each from each. Using an lba of 11700 or 11702, I was only able to boot other browsers from PW. It seems to be something to do with the maigo.bin or sg_dpldr.bin with DP/DK. Same reason I suppose you can't go straight back to the game from the "return to game" option in the DK's and DP's unless you keep em at 45000.
For this reason, PSDv2 will boot from 45000 so that each browser can be accessed from each browser.
Again, I went rambling, but I hope this helps. If you are totally unable to boot a game from a browser, try resorting back to a 45000 lba with the +150 and +166 refs undone too.
-Ex