Hey Nicolas sorry I can't help you for the screening for FO but I assume it is standard stuff. Just beware of the following:
1) On 737 you will have a maximum of 8 days off od which max 4 in a row.
2) The salaries are down 20% in USD or EURO terms due to the fall of the TL
3) You will not be upgraded if you do not have 4 year college degree and also if you do it might not be approved by local authorities
4) The professional level is far from fantastic. Very old style... this is a captain company. CRM is a just a word they fill their mouth with. Lots of ex military pilots with attitudes and no real standard.
enjoy