SQL 2005 SSIS import wizard.  Increase suggest type sample over 10,000 records?

So here is the problem I am running into.  I have a txt file that was exported from another database that has over 5 million records and over 50 columns.  I am using the SQL 2005 Import wizard and attempting to use "Suggest Types".   It goes out and looks at the records and determines the best it can what each column type should be.   Even though you can put over 10,000 in the sample size I don't think it actually takes more than this.  That's where the problem comes in.

 So say you have this large dataset and one of the columns looks like it is only a string with a length of 15, but record 10,050 is a 25 length string.  The file won't import now.  Now sometimes I know the datatypes coming in and I can just select them, but when the number of columns gets large this can be quite tedious.  And then there are other times when I won't know what the column types will be. So being able to quickly import them with suggest types would be highly useful.

 Can 10,000 limit for the Suggested Types sample size be increased so that it checks a larger sample of the data set?  What would be the best practice way of going about doing something like this if you can't?   The DTS Import within SQL 2000 will import this same file and just set everything to varchar(8000) even this could be preferable if it could be done automatically.