You could capture the league games with Fraps if you're fine with having a 20+ Gigabyte replay folder AND huge lags while playing AND if you can convince MonkeyIsland to raise the replay file limitation to ~100 MB per file.
Or you could just reinstall WA... Honestly, my WA is also pretty much customized. I have Silkworm and The Fiddler installed, WormKit, custom speeches, around 200 maps, custom schemes, custom teams. And I promise I don't need much longer than 10 minutes to reinstall WA keeping all that shit.