Media playback component play button

i am using the media playback component to stream a .flv and like everyone else i want mine to look different so i spent ages looking on the net to find out how to customize it.
i found i had to open a copy of MediaComponents.fla and edit the playback component in the library. all is going well and i change the design to fit my website. i export the file and test it. its all going well… until i get up to the play/pause button which seems to be an instance of the button component.
i have no idea how to change this button to what i want. all the information i could find is about skinning the ‘halo’ theme, however i want to change the graphics of the button slightly, not just the colours. for example i only want one colour edge around it and i dont like the down state of it, i would prefer for the outline to simply change colour. also i can change the colour of the play/pause icon which are part of the mediacomponent, but id like the colour to change on rollover.
can anybody help me achieve this? or am i mistaken and i could achieve what i want by editing the halo theme? if so how do i do this and get my modified media component to recognise the new button?
sorry about the long post, i thought i would just make it clear to exactly what im doing because ive spent hours searching the internet and trying different things but once again i’ve had to resort to asking for help on the forums.