The FSI Chinese course contains no Chinese script, so if you want to look up a phonetically written word from the course it would be difficult or just impossible. A good idea, in my mind, would be to procure the ABC Chinese English dictionary(200000 words and phrases)
http://www.amazon.com/ABC-Chinese-English-Comprehensive-Dictionary-Alphabetically/dp/082482766X/ref=sr_1_3/002-6199411-6095228?ie=UTF8&s=books&qid=1173099517&sr=1-3 - http://www.amazon.com/ABC-Chinese-English-Comprehensive-Dictionary-Alphabetically/dp/082482766X/ref=sr_1_3/002-6199411-6095228?ie=UTF8&s=books&qid=1173099517&sr=1-3
or a similar smaller dicionary(:
http://www.amazon.com/ABC-Chinese-English-Dictionary-Alphabetically-Computerized/dp/0824821548/ref=sr_1_6/002-6199411-6095228?ie=UTF8&s=books&qid=1173099517&sr=1-6 - http://www.amazon.com/ABC-Chinese-English-Dictionary-Alphabetically-Computerized/dp/0824821548/ref=sr_1_6/002-6199411-6095228?ie=UTF8&s=books&qid=1173099517&sr=1-6
These dictionaries are arranged strictly alphabetically according to pinyin, so it very easy to look up a word which you have found written in pinyin or have simply overheard. Btw. these dictionaries could help to work with the 9th module which has no workbook.
These dictionaries are very comprehensive, so that they will be still useful even when you have reached very advanced level. Although they are aranged alphabetically, they do contain the usual character indexes according to radicals.
As FSI Thai basic course has no Thai script as well, the following dictionary could also be useful for working with the course, since it contains the section where Thai words are listed according to transliteration together with two other sections - Thai words arranged according to Thai script alphabetical order and English Thai section.
http://www.amazon.com/Thai-English-English-Thai-Dictionary-Non-Thai-Speakers/dp/1887521143/ref=sr_1_1/002-6199411-6095228?ie=UTF8&s=books&qid=1173100199&sr=1-1 - http://www.amazon.com/Thai-English-English-Thai-Dictionary-Non-Thai-Speakers/dp/1887521143/ref=sr_1_1/002-6199411-6095228?ie=UTF8&s=books&qid=1173100199&sr=1-1
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