The option to use only the halos as DRL's has to do with the light module in the cars.. In version 2 that is used up until sometime in 2007 does not have the possibillity to use only the haloes. After that it is possible.
I haven't seen any coding option for the light module version 2 that allows you to only use them. If one of you guys knows the options for it, please let me know.
'06 E91 330dA Sparkling Graphite|19" AvantGarde M359 Satin Black|335i brakes|Bilstein B16 IRC|Powerflex|GroundControl|Wagner|Ecotune|Turbo Dynamics|Zimmermann