Cross browser CSS hacks for Magento store

Magento store design complete, but CSS needs to be modified for cross-browser compatibility with: - IE 6,7 & 8 - Firefox - Chrome - Safari Additionally, the store is bi-lingual (Arabic/English), and because Arabic is a right-to-left language, it also needs different CSS. The winning bidder must be available on skype throughout the project, during business hours, Eastern Time (New York, USA). Thank you!