Condition Tray Icon Transparent Background?

I was wondering if it’s possible to have transparent backgrounds for the tray condition icons? The weather icons I use are transparent background .gif’s (they were .png’s to start with but I converted them to .gif’s because I couldn’t get them to show up being .png’s) but when I select them to use for the tray it puts a white background on them which is harder to see then if they had a transparent background. For example, the temp number in the tray is white numbers with transparent background and I can see it very clearly with my black taskbar. I just would like the same thing with the condition icon if possible. I’m sorry in advance if I missed this option in the program or if it’s been talked about before. I looked through the forums a little and didn’t see this mentioned. Thanks.