From within SSIS, {t}, {CR}, {LF}, and {CR}{LF} are listed in the dropdown of row and column delimiters. I was wondering if there are other nomenclatures using the braces notation for non-printable characters? I've tried the following without success:
{bell} - bell {b} - backspace {^^} - column delimiter control character
From my experience, the flat file import task is pretty limited. You could write your own script task or try to find another task.
Here is a list of add-ons for SSIS in codeplex:
A few catch my eye you should look at:
Regular Expression Flat File Source - A regular expression based flat file parsing source.
Delimited File Reader Source - A source component capable of parsing delimited flat files, including files with rows that are missing column fields.
Delimited File Source - An extremely robust flat file source for Integration Services which handles quoted text and provides full data auditing. Based on the work of Microsoft's Bob Bojanic (Delimited File Reader Source Sample).