A couple small problems

I am having a couple of small problems with Pro Maps, and wondering if there is an easy solution.

1: The time to load is extremely slow in "Internet Explorer" or "Safari". If a result with approximately 30 - 40 records is chosen, the load time is about 15 - 20 seconds. When results of a few hundred, it is minutes, and users will never stick around that long. I was under the impression the XML cache file would help this problem, but it doesn't seem to make much difference (yes - the XML cache file is being created, and has the appropriate entries)

Firefox 4 loads fast, as does Google Chrome, but Safari and IE take a long time.

To test this I have a test page that pulls approximately 30 - 40 records.
(Link Removed)

2: On occassion, once the map loads it zooms out to show all of North America despite that fact there are only pins in the one city/town. It seems to do this when there are a lot of pins.

To test this, you can use this URL. Only do this in Firefox, as it has 900 pins and takes forever in IE. Firefox should load in 30 seconds or so.
(Link Removed)

3: Is there any way to stop it from opening the first address automatically in a balloon? I just want the pins to show, then let the user decide what to choose.

4: Is there any way to make the balloon wider? I need more width to work with so I can insert some images and still line up the address the way I need it to.

5: Is there any way to Group pins? Some cities (Winnipeg, Calgary, Edmonton, Toronto, etc...) have hundreds of pins, and it would be great if they could group, and open up as someone zooms into an area.